An evaluation of a visual-visual successive matching-to-sample procedure to establish equivalence classes in adults.

Traditionally, behavior analysts have studied stimulus equivalence using a matching-to-sample (MTS) preparation. Although researchers have shown the utility of MTS to yield equivalence classes, the procedure requires several prerequisite skills for a learner to accurately respond. Previous research with humans and nonhumans has shown that relational responding can be produced via compound stimulus discrimination and successive matching-to-sample (S-MTS).